1 // Copyright 2021 The SwiftShader Authors. All Rights Reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "libXCB.hpp"
16
17 #include "System/SharedLibrary.hpp"
18
19 #include <memory>
20
LibXcbExports(void * libxcb,void * libshm)21 LibXcbExports::LibXcbExports(void *libxcb, void *libshm)
22 {
23 getFuncAddress(libxcb, "xcb_create_gc", &xcb_create_gc);
24 getFuncAddress(libxcb, "xcb_flush", &xcb_flush);
25 getFuncAddress(libxcb, "xcb_free_gc", &xcb_free_gc);
26 getFuncAddress(libxcb, "xcb_generate_id", &xcb_generate_id);
27 getFuncAddress(libxcb, "xcb_get_geometry", &xcb_get_geometry);
28 getFuncAddress(libxcb, "xcb_get_geometry_reply", &xcb_get_geometry_reply);
29 getFuncAddress(libxcb, "xcb_put_image", &xcb_put_image);
30 getFuncAddress(libxcb, "xcb_copy_area", &xcb_copy_area);
31 getFuncAddress(libxcb, "xcb_free_pixmap", &xcb_free_pixmap);
32 getFuncAddress(libxcb, "xcb_get_extension_data", &xcb_get_extension_data);
33 getFuncAddress(libxcb, "xcb_connection_has_error", &xcb_connection_has_error);
34 getFuncAddress(libxcb, "xcb_get_maximum_request_length", &xcb_get_maximum_request_length);
35
36 getFuncAddress(libshm, "xcb_shm_query_version", &xcb_shm_query_version);
37 getFuncAddress(libshm, "xcb_shm_query_version_reply", &xcb_shm_query_version_reply);
38 getFuncAddress(libshm, "xcb_shm_attach", &xcb_shm_attach);
39 getFuncAddress(libshm, "xcb_shm_detach", &xcb_shm_detach);
40 getFuncAddress(libshm, "xcb_shm_create_pixmap", &xcb_shm_create_pixmap);
41 xcb_shm_id = (xcb_extension_t *)getProcAddress(libshm, "xcb_shm_id");
42 }
43
operator ->()44 LibXcbExports *LibXCB::operator->()
45 {
46 return loadExports();
47 }
48
loadExports()49 LibXcbExports *LibXCB::loadExports()
50 {
51 static LibXcbExports exports = [] {
52 void *libxcb = nullptr;
53 void *libshm = nullptr;
54 if(getProcAddress(RTLD_DEFAULT, "xcb_create_gc")) // Search the global scope for pre-loaded XCB library.
55 {
56 libxcb = RTLD_DEFAULT;
57 }
58 else
59 {
60 libxcb = loadLibrary("libxcb.so.1");
61 }
62
63 if(getProcAddress(RTLD_DEFAULT, "xcb_shm_query_version")) // Search the global scope for pre-loaded XCB library.
64 {
65 libshm = RTLD_DEFAULT;
66 }
67 else
68 {
69 libshm = loadLibrary("libxcb-shm.so.0");
70 }
71
72 return LibXcbExports(libxcb, libshm);
73 }();
74
75 return exports.xcb_create_gc ? &exports : nullptr;
76 }
77
78 LibXCB libXCB;
79